/*
 * Copyright (c) 2013 Functional Streams for Scala
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package fs2.protocols
package ip

import fs2.interop.scodec.StreamDecoder
import fs2.protocols.ethernet.{EthernetFrameHeader, EtherType}

import com.comcast.ip4s.IpAddress

sealed trait IpHeader {
  def protocol: Int
  def sourceIp: IpAddress
  def destinationIp: IpAddress
}

object IpHeader {
  def sdecoder(ethernetHeader: EthernetFrameHeader): StreamDecoder[IpHeader] =
    ethernetHeader.ethertype match {
      case Some(EtherType.IPv4) => StreamDecoder.once(Ipv4Header.codec)
      case Some(EtherType.IPv6) => StreamDecoder.once(Ipv6Header.codec)
      case _                    => StreamDecoder.empty
    }
}

private[ip] trait UnsealedIpHeader extends IpHeader
